40/90 = 4/9
4/15
4/15
2/45
4/15
1/4
45/4
-40/90 = -4/9
90/40 simplifies to: 9/4 or 21/4 or 2.25
The correct answer for this question is 4 over 9
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 18, 72/90 is equal to 4/5 or four fifths.
4